# Consider #y = f(x) = (x-2) / (x+2)#, does this formula define a function for #-3<x< 3#?

##### 1 Answer

Mar 28, 2017

No, the rational expression is undefined when

#### Explanation:

When

So the formula would say:

#f(-2) = -4/0#

which is undefined, since division by zero is (almost) always undefined.